help with a APC ups mod

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  • yonu
    Senior Member
    • Nov 2007
    • 138
    • United States

    #1

    help with a APC ups mod

    OK all u have a APC back-ups 350 es with a blown inverter. What I would like to do is repurposed the circuit by removing the 110v inverter and using it as a 12v monitor/ trikle charger for another project. I wanted to see what anyone more knowledgeable with PSUs and UPSs thought of this idea.

    Thanks,
    Yonu
  • Kiriakos GR
    Banned
    • May 2012
    • 940
    • Greece

    #2
    Re: help with a APC ups mod

    Its like seeking for trouble.
    All the job regarding charging is made automatically by it electronic controller (main chip).
    What makes you think that this one survived from been blown too ?

    Comment

    • yonu
      Senior Member
      • Nov 2007
      • 138
      • United States

      #3
      Re: help with a APC ups mod

      Well I don't know I do know that according to my voltmeter the battery connections still put out 12v and if I hook abattery to it windows sees the battery so I figured if nothing else I could reuse the monitoring part.

      Thanks,
      Yonu

      Comment

      • Kiriakos GR
        Banned
        • May 2012
        • 940
        • Greece

        #4
        Re: help with a APC ups mod

        I do not wish to discourage you, but is far complex to modify it than repairing the blown inverter.

        Comment

        • yonu
          Senior Member
          • Nov 2007
          • 138
          • United States

          #5
          Re: help with a APC ups mod

          OK thanks

          Comment

          • budm
            Badcaps Legend
            • Feb 2010
            • 40746
            • USA

            #6
            Re: help with a APC ups mod

            So you can hook up the computer to it and you can use APC software to see the AC line voltage and the Batteries info? I sounds like the MOFETs or the drive circuits are damage but not the monitoring circuit are not damage, those circuit is working when the UPS is not in batteries mode any way (inverter section is not need to be running). You have to connected the batteries to it and check the charging current, the low end UPS does not really have complex charging system where it goes through many charging stages.
            Never stop learning
            Basic LCD TV and Monitor troubleshooting guides.
            http://www.badcaps.net/forum/showthr...956#post305956

            Voltage Regulator (LDO) testing:
            http://www.badcaps.net/forum/showthr...999#post300999

            Inverter testing using old CFL:
            http://www.badcaps.net/forum/showthr...er+testing+cfl

            Tear down pictures : Hit the ">" Show Albums and stories" on the left side
            http://s807.photobucket.com/user/budm/library/

            TV Factory reset codes listing:
            http://www.badcaps.net/forum/showthread.php?t=24809

            Comment

            • yonu
              Senior Member
              • Nov 2007
              • 138
              • United States

              #7
              Re: help with a APC ups mod

              Ok please be nice as this is more than likely going to seem very stupid. I have a Idea of how/what I want to do this just not familiar enough with the internals of a ups to sort out what I need to remove or disconnect.

              ok I have tested every part of the back-ups 350 es I have setting here and the only thing I can tell is dead is the inverter. now I have no reason for repair/replace the inverter as I don't need it.

              What I would like to do is make a new casing and put the unit inline with my 12v battery backup system I have on my low voltage equipment the total load is 3A at 12VDC as I am tired of having to check the batteries. Now I could simply splice in the battery connectors so that it can read the battery voltage and send it to the computer via USB. However my goal is to have it setup so that the load is setup so that the UPS can stay plugged in to 110v for lack of any other way to put it but to act as a giant wall wart unless the power is out then switch to the batteries basically like it works for 110v currently.

              Oh and since I know this will be asked part of reason for this is so that I can pass the battery levels over to my Home automation system.

              Like I said I more than likely sound like a nut job,
              yonu

              Comment

              • budm
                Badcaps Legend
                • Feb 2010
                • 40746
                • USA

                #8
                Re: help with a APC ups mod

                OK, I see, you want 12VDC UPS (instead of 120VAC UPS) with batteries charger, and monitoring capability through USB interface. I do not believe the charger circuit can put out 3A + Plus charging the batteries at the same time, more likely to have 1A at most.
                The model is 350, not something like XX-350?
                How is the "12v battery backup system" working right now, just run of the batteries with or without charger?
                Last edited by budm; 07-23-2014, 10:12 PM. Reason: P
                Never stop learning
                Basic LCD TV and Monitor troubleshooting guides.
                http://www.badcaps.net/forum/showthr...956#post305956

                Voltage Regulator (LDO) testing:
                http://www.badcaps.net/forum/showthr...999#post300999

                Inverter testing using old CFL:
                http://www.badcaps.net/forum/showthr...er+testing+cfl

                Tear down pictures : Hit the ">" Show Albums and stories" on the left side
                http://s807.photobucket.com/user/budm/library/

                TV Factory reset codes listing:
                http://www.badcaps.net/forum/showthread.php?t=24809

                Comment

                • yonu
                  Senior Member
                  • Nov 2007
                  • 138
                  • United States

                  #9
                  Re: help with a APC ups mod

                  I don't have it in front of me right now but I think the model number is BK350R the current setup is 2 deep cycles I charge every couple weeks. I started doing this because 2 of the wall warts caused to much RF in my HAM radios and after 2yrs it has been working fine.

                  Thanks,
                  yonu

                  Comment

                  • budm
                    Badcaps Legend
                    • Feb 2010
                    • 40746
                    • USA

                    #10
                    Re: help with a APC ups mod

                    This one? It is quite new.
                    https://www.apc.com/products/resourc...base_sku=BK350
                    Last edited by budm; 07-23-2014, 10:17 PM.
                    Never stop learning
                    Basic LCD TV and Monitor troubleshooting guides.
                    http://www.badcaps.net/forum/showthr...956#post305956

                    Voltage Regulator (LDO) testing:
                    http://www.badcaps.net/forum/showthr...999#post300999

                    Inverter testing using old CFL:
                    http://www.badcaps.net/forum/showthr...er+testing+cfl

                    Tear down pictures : Hit the ">" Show Albums and stories" on the left side
                    http://s807.photobucket.com/user/budm/library/

                    TV Factory reset codes listing:
                    http://www.badcaps.net/forum/showthread.php?t=24809

                    Comment

                    • yonu
                      Senior Member
                      • Nov 2007
                      • 138
                      • United States

                      #11
                      Re: help with a APC ups mod

                      Sorry it is a BE350R I went out and checked

                      not sure why I thought BK


                      Thanks,
                      Yonu

                      Comment

                      • budm
                        Badcaps Legend
                        • Feb 2010
                        • 40746
                        • USA

                        #12
                        Re: help with a APC ups mod

                        OK, one of those plastic case one.
                        Never stop learning
                        Basic LCD TV and Monitor troubleshooting guides.
                        http://www.badcaps.net/forum/showthr...956#post305956

                        Voltage Regulator (LDO) testing:
                        http://www.badcaps.net/forum/showthr...999#post300999

                        Inverter testing using old CFL:
                        http://www.badcaps.net/forum/showthr...er+testing+cfl

                        Tear down pictures : Hit the ">" Show Albums and stories" on the left side
                        http://s807.photobucket.com/user/budm/library/

                        TV Factory reset codes listing:
                        http://www.badcaps.net/forum/showthread.php?t=24809

                        Comment

                        • yonu
                          Senior Member
                          • Nov 2007
                          • 138
                          • United States

                          #13
                          Re: help with a APC ups mod

                          You got it.

                          Comment

                          • yonu
                            Senior Member
                            • Nov 2007
                            • 138
                            • United States

                            #14
                            Re: help with a APC ups mod

                            Out of curiosity is the 40amp fuse in the charging circuit or the inverter circuit just cant figure out why they used such a large fuse.

                            Thanks,
                            yonu

                            Comment

                            • Kiriakos GR
                              Banned
                              • May 2012
                              • 940
                              • Greece

                              #15
                              Re: help with a APC ups mod

                              Are you talking about some colored ones ( car Fuse type) ?

                              Comment

                              • yonu
                                Senior Member
                                • Nov 2007
                                • 138
                                • United States

                                #16
                                Re: help with a APC ups mod

                                Heap a 40A ATC automotive fuse

                                Comment

                                • budm
                                  Badcaps Legend
                                  • Feb 2010
                                  • 40746
                                  • USA

                                  #17
                                  Re: help with a APC ups mod

                                  Can upload the pictures of the inside of the unit? That fuse is in series with the batteries, to produce 230W (350VA) output from 12V, you need more than 20A (~30A) of current from batteries.
                                  Never stop learning
                                  Basic LCD TV and Monitor troubleshooting guides.
                                  http://www.badcaps.net/forum/showthr...956#post305956

                                  Voltage Regulator (LDO) testing:
                                  http://www.badcaps.net/forum/showthr...999#post300999

                                  Inverter testing using old CFL:
                                  http://www.badcaps.net/forum/showthr...er+testing+cfl

                                  Tear down pictures : Hit the ">" Show Albums and stories" on the left side
                                  http://s807.photobucket.com/user/budm/library/

                                  TV Factory reset codes listing:
                                  http://www.badcaps.net/forum/showthread.php?t=24809

                                  Comment

                                  • yonu
                                    Senior Member
                                    • Nov 2007
                                    • 138
                                    • United States

                                    #18
                                    Re: help with a APC ups mod

                                    sure pics will be right up and wasn't sure was just curious about the fuse

                                    Comment

                                    • yonu
                                      Senior Member
                                      • Nov 2007
                                      • 138
                                      • United States

                                      #19
                                      Re: help with a APC ups mod

                                      Ok here are the pics of the PCB
                                      Attached Files

                                      Comment

                                      • budm
                                        Badcaps Legend
                                        • Feb 2010
                                        • 40746
                                        • USA

                                        #20
                                        Re: help with a APC ups mod

                                        Please look at that TO-220 device to get the P/N, I expect it to be xx317 printed on it.
                                        Attached Files
                                        Never stop learning
                                        Basic LCD TV and Monitor troubleshooting guides.
                                        http://www.badcaps.net/forum/showthr...956#post305956

                                        Voltage Regulator (LDO) testing:
                                        http://www.badcaps.net/forum/showthr...999#post300999

                                        Inverter testing using old CFL:
                                        http://www.badcaps.net/forum/showthr...er+testing+cfl

                                        Tear down pictures : Hit the ">" Show Albums and stories" on the left side
                                        http://s807.photobucket.com/user/budm/library/

                                        TV Factory reset codes listing:
                                        http://www.badcaps.net/forum/showthread.php?t=24809

                                        Comment

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